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EP4080781B1 - Dispositif de communication et procédé de fonctionnement - Google Patents

Dispositif de communication et procédé de fonctionnement

Info

Publication number
EP4080781B1
EP4080781B1 EP21170315.2A EP21170315A EP4080781B1 EP 4080781 B1 EP4080781 B1 EP 4080781B1 EP 21170315 A EP21170315 A EP 21170315A EP 4080781 B1 EP4080781 B1 EP 4080781B1
Authority
EP
European Patent Office
Prior art keywords
antenna
antennas
communication device
power level
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP21170315.2A
Other languages
German (de)
English (en)
Other versions
EP4080781A1 (fr
Inventor
Dorian Haslinger
Wolfgang Eber
David VEIT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NXP BV
Original Assignee
NXP BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NXP BV filed Critical NXP BV
Priority to EP21170315.2A priority Critical patent/EP4080781B1/fr
Priority to CN202210285026.XA priority patent/CN115242276A/zh
Priority to US17/658,945 priority patent/US11973551B2/en
Publication of EP4080781A1 publication Critical patent/EP4080781A1/fr
Application granted granted Critical
Publication of EP4080781B1 publication Critical patent/EP4080781B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
    • G01S13/765—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with exchange of information between interrogator and responder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds

Definitions

  • US 2020/118372 A1 describes a method of communicating with a portable access device, which includes iteratively performing an algorithm via an access module of a vehicle.
  • the algorithm includes a series of operations including: selecting a frequency from multiple frequencies; selecting an antenna pair from multiple possible antenna pairs, where antennas of the possible antenna pairs include antennas with different polarized axes; transmitting a packet to the portable access device via the selected antenna pair; receiving a first RSSI and a response signal from the portable access device, the first RSSI corresponds to the transmission of the packet; and measuring a second RSSI of the response signal; based on the first RSSIs and the second RSSIs. A best one of the frequencies and a best antenna pair of the possible antenna pairs are selected. One or more additional packets are transmitted using the selected best frequency and the selected best antenna pair.
  • US 2012/219036 A1 describes a technique for multiple antennas on a body-mounted node to improve ranging availability.
  • the technique also supports utilizing transmit antenna diversity for reliable ranging, wherein the antenna diversity can be achieved by employing two separate transmitter chains.
  • a communication device is provided, as defined in claim 1.
  • Advantageous embodiments are defined in the dependent claims.
  • a method of operating a communication device is conceived, as defined in claim 12.
  • real-time localization systems typically include a plurality of so-called anchors, which are placed at fixed positions in the environment (e.g., a vehicle, a building or a room), and a plurality of mobile nodes, which are often referred to as tags.
  • tags Using radio technology, a tag can determine its position relative to the available anchors.
  • the tag's orientation relative to the environment and anchors is arbitrary and cannot be controlled.
  • the influence of the human body on the wave propagation between tags and anchors is significant. Nevertheless, these applications demand that the ranging and localization works independently of the position (e.g., front pocket, back pocket or handbag) and orientation (i.e., rotation in space) of the tags. In real environments these systems should cope with multipath propagation and antenna detuning, which can cause a significant variance in the distance estimates.
  • UWB In the following UWB is described as an example. However, as mentioned above, other technologies may also be used for executing the ranging sessions.
  • UWB technology may be used to measure the distance between a UWB communication node (for example, a mobile device that functions as a key for accessing a vehicle or opening a door) and various external UWB communication nodes (for example, a vehicle and a door).
  • a UWB communication node for example, a mobile device that functions as a key for accessing a vehicle or opening a door
  • various external UWB communication nodes for example, a vehicle and a door.
  • distance measurements are performed during UWB communication sessions referred to as a ranging session.
  • the parameters include a previously measured distance between the communication device and the external communication counterpart. In this way, the selection of a suitable antenna for performing the ranging sessions is further facilitated. In particular, the likelihood that the most suitable antenna is selected may be further increased.
  • the previously measured distance provides a particularly suitable indication of the channel quality between each of the respective antennas and the external communication counterpart.
  • the antenna selection unit is configured to select the specific antenna that resulted in a smallest previously measured distance among the plurality of antennas or the specific antenna that resulted in a largest previously measured distance among the plurality of antennas. In this way, the likelihood that the most suitable antenna is selected for next distance measurements may be further increased.
  • the parameters include a first path power level.
  • the selection of a suitable antenna for performing the ranging sessions is further facilitated.
  • the likelihood that the most suitable antenna is selected may be further increased.
  • the estimated channel impulse response consists of multiple taps (or bins, or samples) relating to the power received by the receiving device at a given time.
  • the first path refers to the first tap in the estimated channel impulse response that contains sufficient energy of the transmitted signal for the receiver to distinguish it from noise. Whether the first sample (for example, an edge) or the first peak following this sample (for example, a local maximum) is used depends on the implementation.
  • the first path power level may be defined as the power value of this first path.
  • the antenna selection unit is configured to select the specific antenna that resulted in a lowest first path power level among the plurality of antennas or the specific antenna that resulted in a highest first path power level among the plurality of antennas. In this way, the likelihood that the most suitable antenna is selected for next distance measurements may be further increased.
  • the antenna resulting in the lowest first path power may be the most suitable antenna
  • the antenna resulting in the highest first path power may be the most suitable antenna.
  • the use of the lowest first path power may result in a better performance on average. Still under some environmental conditions the use of the highest first path power may yield a higher performance.
  • the deciding factor may be the environment, which is mostly determined by the application. However, different environments may occur for the same application, e.g. a car on an empty parking lot versus a car on a full parking lot or garage.
  • the antenna selection unit is configured to select the specific antenna that resulted in a lowest ratio between the first path power level and the received power level among the plurality of antennas or to select the specific antenna that resulted in a highest ratio between the first path power level and the received power level among the plurality of antennas.
  • the antenna resulting in the lowest first path power to received power ratio may be the most suitable antenna
  • the antenna resulting in the highest first path power to received power ratio may be the most suitable antenna. It is noted that in most scenarios the use of a lower first path power to received power ratio results in a higher performance. However, in some scenarios, the use of a higher ratio may yield a better performance.
  • the antenna selection unit is further configured to switch to a next antenna of said plurality of antennas if a difference between two or more consecutive distance measurements performed on a current antenna exceeds a predefined first threshold. In this way, the selection of a suitable antenna for performing the ranging sessions is further facilitated. In particular, if said difference exceeds the first threshold, then the current antenna may not result in sufficiently stable distance measurements. In one or more embodiments, the antenna selection unit is further configured to switch to a next antenna of said plurality of antennas if a difference between first path power levels associated with two or more consecutive distance measurements exceeds a predefined second threshold. In this way, the selection of a suitable antenna for performing the ranging sessions is further facilitated. In particular, if said difference exceeds the second threshold, then the current antenna may not result in sufficiently stable distance measurements.
  • each anchor or tag may be able to decide autonomously which antenna is the most suitable antenna. In this way, the antenna diversity of the system may become transparent to higher processing layers (e.g., a localization engine). More specifically, the presently disclosed embodiments of operating methods may be performed independently by each anchor or tag.
  • Fig. 3 shows another illustrative embodiment of a method 300 of operating a communication device.
  • the method 300 comprises the following basic steps. At 302, the method starts. At 304, a ranging is performed on all antennas. Furthermore, at 306, the antenna is determined which resulted in the lowest or the highest distance estimate (i.e., the lowest or highest estimate based on at least one previous distance measurement). Finally, at 308, N rangings are performed on the selected antenna. More specifically, the method 300 may be implemented as follows:
  • Fig. 4 shows a further illustrative embodiment of a method 400 of operating a communication device.
  • the method 400 comprises the following basic steps. At 402, the method starts. At 404, a ranging is performed on all antennas. Furthermore, at 406, the antenna is determined which resulted in the lowest or the highest first path power (i.e., the lowest or highest first path power level as determined for a previous ranging session). Finally, at 408, N rangings are performed on the selected antenna. More specifically, the method 400 may be implemented as follows:
  • Fig. 6 shows an embodiment of a method 600 of operating a communication device according to the claimed invention.
  • the method 600 comprises the following basic steps. At 602, the method starts. At 604, an initial antenna is selected. At 606, ranging is performed on the selected antenna. Then, at 608, it is checked if the difference between the last N distance estimates exceeds a threshold. If so, then a next antenna is selected at 612. If not, then the method 600 returns to step 606. More specifically, the method 600 may be implemented as follows:
  • Fig. 7 shows a further illustrative embodiment of a method 700 of operating a communication device.
  • the method 700 comprises the following basic steps. At 702, the method starts. At 704, an initial antenna is selected. At 706, ranging is performed on the selected antenna. Then, at 708, it is checked if the difference between the last N first path power values exceeds a threshold. If so, then a next antenna is selected at 712. If not, then the method 700 returns to step 706. More specifically, the method 700 may be implemented as follows:
  • the computer-readable medium may include the following: an electrical connection having one or more wires, a portable computer diskette, a random-access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CDROM), a digital versatile disc (DVD), a Blu-ray disc (BD), and a memory card.
  • RAM random-access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CDROM compact disc read-only memory
  • DVD digital versatile disc
  • BD Blu-ray disc

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (13)

  1. Dispositif de communication (100) comprenant :
    - une pluralité d'antennes (102, 104, 106) ;
    - une unité de communication (108) configurée pour exécuter des sessions de télémétrie avec un homologue de communication externe par l'intermédiaire desdites antennes (102, 104, 106) ;
    - une unité de sélection d'antenne reconfigurable (110) configurée pour sélectionner une antenne spécifique parmi ladite pluralité d'antennes (102, 104, 106) pour réaliser une ou plusieurs desdites sessions de télémétrie, où l'unité de sélection d'antenne (110) est configurée pour sélectionner ladite antenne spécifique en fonction d'un ou plusieurs paramètres indicatifs d'une qualité de communication entre les antennes (102, 104, 106) et l'homologue de communication externe ;
    caractérisé en ce que l'unité de sélection d'antenne (110) est en outre configurée pour passer à une antenne suivante parmi ladite pluralité d'antennes si une différence entre deux ou plusieurs mesures de distance consécutives effectuées sur l'antenne actuelle dépasse un premier seuil prédéfini.
  2. Dispositif de communication (100) selon la revendication 1, dans lequel lesdits paramètres comprennent une distance précédemment mesurée entre le dispositif de communication (100) et l'homologue de communication externe.
  3. Dispositif de communication (100) selon la revendication 2, dans lequel l'unité de sélection d'antenne (110) est configurée pour sélectionner l'antenne spécifique qui a donné lieu à la plus petite distance précédemment mesurée parmi la pluralité d'antennes (102, 104, 106) ou l'antenne spécifique qui a donné lieu à la plus grande distance précédemment mesurée parmi la pluralité d'antennes (102, 104, 106).
  4. Dispositif de communication (100) selon l'une quelconque des revendications précédentes, dans lequel lesdits paramètres comprennent un premier niveau de puissance de trajet, le premier niveau de puissance de trajet étant le niveau de puissance d'un premier trajet, ledit premier trajet étant la première dérivation dans une réponse impulsionnelle de canal estimée qui contient suffisamment d'énergie d'un signal transmis pour qu'un récepteur puisse distinguer le signal transmis du bruit.
  5. Dispositif de communication (100) selon la revendication 4, dans lequel l'unité de sélection d'antenne (110) est configurée pour sélectionner l'antenne spécifique qui a donné lieu au niveau de puissance de premier trajet le plus bas parmi la pluralité d'antennes (102, 104, 106) ou l'antenne spécifique qui a donné lieu au niveau de puissance de premier trajet le plus élevé parmi la pluralité d'antennes (102, 104, 106).
  6. Dispositif de communication (100) selon l'une quelconque des revendications précédentes, dans lequel lesdits paramètres comprennent un rapport entre un niveau de puissance de premier trajet et un niveau de puissance reçu, où le niveau de puissance du premier trajet est le niveau de puissance d'un premier trajet, ledit premier trajet étant la première dérivation dans une réponse impulsionnelle estimée du canal qui contient suffisamment d'énergie d'un signal transmis pour qu'un récepteur puisse distinguer le signal transmis du bruit, et où le niveau de puissance reçu est calculé à partir de la réponse impulsionnelle estimée du canal en additionnant les valeurs de puissance de la réponse impulsionnelle estimée du canal dans une fenêtre donnée centrée sur le pic le plus élevé de la réponse impulsionnelle estimée du canal.
  7. Dispositif de communication (100) selon la revendication 6, dans lequel l'unité de sélection d'antenne (110) est configurée pour sélectionner l'antenne spécifique qui a donné lieu au rapport le plus faible entre le niveau de puissance du premier trajet et le niveau de puissance reçu parmi la pluralité d'antennes (102, 104, 106) ou pour sélectionner l'antenne spécifique qui a donné lieu au rapport le plus élevé entre le niveau de puissance du premier trajet et le niveau de puissance reçu parmi la pluralité d'antennes (102, 104, 106).
  8. Dispositif de communication (100) selon l'une quelconque des revendications précédentes, dans lequel l'unité de sélection d'antenne (110) est en outre configurée pour passer à une antenne suivante parmi ladite pluralité d'antennes (102, 104, 106) si une différence entre les niveaux de puissance du premier trajet associés à deux ou plusieurs mesures de distance consécutives dépasse un deuxième seuil prédéfini, où les niveaux de puissance du premier trajet sont les niveaux de puissance d'un premier trajet, ledit premier trajet étant la première dérivation dans une réponse impulsionnelle de canal estimée qui contient suffisamment d'énergie d'un signal transmis pour qu'un récepteur puisse distinguer le signal transmis du bruit.
  9. Dispositif de communication (100) selon l'une quelconque des revendications précédentes, dans lequel l'unité de sélection d'antenne (110) est en outre configurée pour passer à une antenne suivante parmi ladite pluralité d'antennes (102, 104, 106) après qu'un nombre prédéfini de sessions de télémétrie a été effectué sur l'antenne actuelle.
  10. Dispositif de communication (100) selon l'une quelconque des revendications précédentes, comprenant en outre une unité de traitement configurée pour calculer une valeur moyenne arithmétique des résultats des sessions de télémétrie effectuées sur différentes antennes de ladite pluralité d'antennes (102, 104, 106).
  11. Dispositif de communication (100) selon l'une quelconque des revendications précédentes, dans lequel l'unité de communication (108) est une unité de communication à bande ultra-large, UWB.
  12. Procédé (200) de fonctionnement d'un dispositif de communication, le dispositif comprenant une pluralité d'antennes, une unité de communication et une unité de sélection d'antenne reconfigurable, le procédé comprenant les étapes suivantes :
    - sélectionner (202), par l'unité de sélection d'antennes, une antenne spécifique parmi ladite pluralité d'antennes pour réaliser une ou plusieurs sessions de télémétrie, où l'unité de sélection d'antennes sélectionne ladite antenne spécifique en fonction d'un ou plusieurs paramètres indicatifs d'une qualité de communication entre les antennes et un homologue de communication externe ;
    - exécuter (204), par l'unité de communication, lesdites sessions de télémétrie avec l'homologue de communication externe avec l'antenne spécifique sélectionnée ;
    caractérisé en ce que l'unité de sélection d'antenne passe à une antenne suivante parmi ladite pluralité d'antennes si une différence entre deux, ou davantage, mesures de distance consécutives effectuées sur l'antenne actuelle dépasse un premier seuil prédéfini.
  13. Programme informatique comprenant des instructions exécutables qui, lorsqu'elles sont exécutées par un dispositif de communication, amènent ledit dispositif de communication à mettre en œuvre le procédé selon la revendication 12.
EP21170315.2A 2021-04-23 2021-04-23 Dispositif de communication et procédé de fonctionnement Active EP4080781B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP21170315.2A EP4080781B1 (fr) 2021-04-23 2021-04-23 Dispositif de communication et procédé de fonctionnement
CN202210285026.XA CN115242276A (zh) 2021-04-23 2022-03-22 通信装置和操作方法
US17/658,945 US11973551B2 (en) 2021-04-23 2022-04-12 Communication device and operating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21170315.2A EP4080781B1 (fr) 2021-04-23 2021-04-23 Dispositif de communication et procédé de fonctionnement

Publications (2)

Publication Number Publication Date
EP4080781A1 EP4080781A1 (fr) 2022-10-26
EP4080781B1 true EP4080781B1 (fr) 2025-10-01

Family

ID=75674635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21170315.2A Active EP4080781B1 (fr) 2021-04-23 2021-04-23 Dispositif de communication et procédé de fonctionnement

Country Status (3)

Country Link
US (1) US11973551B2 (fr)
EP (1) EP4080781B1 (fr)
CN (1) CN115242276A (fr)

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US20240201363A1 (en) * 2022-12-19 2024-06-20 Nxp B.V. Communication node with interleaved ranging sessions
WO2024187404A1 (fr) * 2023-03-15 2024-09-19 Qualcomm Incorporated Estimation de canal par tap pour un signal de référence d'onde continue modulé en fréquence

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Also Published As

Publication number Publication date
US11973551B2 (en) 2024-04-30
US20220345184A1 (en) 2022-10-27
EP4080781A1 (fr) 2022-10-26
CN115242276A (zh) 2022-10-25

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